Write each whole number in expanded form.60,300
A. 6,300,000
B. 6000 + 300
C. 60,000 + 300
D. 60,000 + 3000
Answer: C
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Find the weighted mean. Round to the nearest tenth.
A. 73.1 B. 231.8 C. 278.7 D. 264.9
Solve the problem.Prices in an economy with a 12% annual inflation rate can be modeled by P = pert, where r is the inflation rate, t is the time in years, and p is the current price. How long will it take for prices in the economy to double at a 12% annual inflation rate?
A. 23.45 years B. 6.78 years C. 5.78 years D. 9.16 years
Solve the problem.The charges for renting a moving van are $55 for the first 30 miles and $7 for each additional mile. Assume that a fraction of a mile is rounded up. (i) Determine the cost of driving the van 87 miles. (ii) Find a symbolic representation for a function f that computes the cost of driving the van x miles, where 
(Hint: express f as a piecewise-constant function.)
A. $454;
f(x) = 
B. $5184;
f(x) = 
C. $874;
f(x) = 
Solve.The amount of time it takes a swimmer to swim a race varies inversely as the average speed of the swimmer. A swimmer finishes a race in 37.5 seconds with an average speed of 4 feet per second. Find the average speed of the swimmer if it takes 25 seconds to finish the race.
A. 8 ft/sec B. 6 ft/sec C. 7 ft/sec D. 5 ft/sec